Powerextra DS-F970 Dual Battery Charger with USB AC/DC Power Adapter and LCD Display for Sony NP-F550, NP-F750, NP-F970 Battery

Using a USB 2.0 plug for connecting to a computer or wall charger. Charger is able to charge two original batteries or replacement batteries at the same time, built-in LED indicator turns on when charging, off when the battery is completely charged, and blinks when an error is detected.